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<TITLE> [Mono-bugs] [Bug 470568] mono_thread_current() called after TlsFree(current_object_key)
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<H1>[Mono-bugs] [Bug 470568] mono_thread_current() called after TlsFree(current_object_key)</H1>
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<B>bugzilla_noreply at novell.com</B>
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<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%20470568%5D%20mono_thread_current%28%29%20called%20after%0A%20TlsFree%28current_object_key%29&In-Reply-To=bug-470568-28286%40https.bugzilla.novell.com/"
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TITLE="[Mono-bugs] [Bug 470568] mono_thread_current() called after TlsFree(current_object_key)">bugzilla_noreply at novell.com
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<I>Sun Feb 1 16:13:21 EST 2009</I>
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<PRE><A HREF="https://bugzilla.novell.com/show_bug.cgi?id=470568">https://bugzilla.novell.com/show_bug.cgi?id=470568</A>
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User <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">andyhume32 at yahoo.co.uk</A> added comment
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<A HREF="https://bugzilla.novell.com/show_bug.cgi?id=470568#c3">https://bugzilla.novell.com/show_bug.cgi?id=470568#c3</A>
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--- Comment #3 from Andy Hume <<A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">andyhume32 at yahoo.co.uk</A>> 2009-02-01 14:13:19 MST ---
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Out of interest I installed MingW's gdb; it gives correct locations, see below.
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As expected the locations with big offsets were wrong, so the second case was
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actually in mini_thread_cleanup.
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[[
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$ /cygdrive/d/Temp/2009-01/gdb-6.8-mingw-3/bin/gdb.exe --args mono mdoc
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GNU gdb 6.8
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Copyright (C) 2008 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <<A HREF="http://gnu.org/licenses/gpl.html">http://gnu.org/licenses/gpl.html</A>>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law. Type "show copying"
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and "show warranty" for details.
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This GDB was configured as "i686-pc-mingw32"...
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(gdb) directory /cygwin/usr/src/mono/mono/mono/mini/
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Source directories searched: /cygwin/usr/src/mono/mono/mono/mini;$cdir;$cwd
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(gdb) directory /cygwin/usr/src/mono/mono/mono/metadata
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Source directories searched:
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/cygwin/usr/src/mono/mono/mono/metadata;/cygwin/usr
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/src/mono/mono/mono/mini;$cdir;$cwd
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(gdb) break threads.c:mono_thread_cleanup
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No source file named threads.c in loaded symbols.
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Make breakpoint pending on future shared library load? (y or [n]) y
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Breakpoint 1 (threads.c:mono_thread_cleanup) pending.
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(gdb) break threads.c:mono_thread_current
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No source file named threads.c in loaded symbols.
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Make breakpoint pending on future shared library load? (y or [n]) y
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Breakpoint 2 (threads.c:mono_thread_current) pending.
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(gdb) disable breakpoints 2
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(gdb) info breakpoints
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Num Type Disp Enb Address What
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1 breakpoint keep y <PENDING> threads.c:mono_thread_cleanup
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2 breakpoint keep n <PENDING> threads.c:mono_thread_current
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(gdb) run
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Starting program: D:\cygwin\usr\local\bin/mono.exe mdoc
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[New thread 3360.0x2058]
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mono_thread_init: Allocated current_object_key 0x18
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[New thread 3360.0x7a0]
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Cannot open assembly 'mdoc': No such file or directory.
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Breakpoint 1, mono_thread_cleanup () at threads.c:2344
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2344 mono_thread_hazardous_try_free_all ();
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(gdb) backtrace
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#0 mono_thread_cleanup () at threads.c:2344
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#1 0x68fb81ff in mono_runtime_cleanup (domain=<incomplete type>)
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at appdomain.c:299
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#2 0x68ec8b66 in mini_cleanup (domain=0xb84f00) at mini.c:5465
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#3 0x68f20cdd in mono_main (argc=2, argv=0x3f2ab0) at driver.c:1608
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#4 0x00401392 in main () at main.c:25
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(gdb) enable breakpoint 2
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(gdb) cont
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Continuing.
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[Switching to thread 3360.0x7a0]
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Breakpoint 2, mono_thread_current () at threads.c:1275
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1275 { printf ("%s: mono_thread_current calling GET_CURRENT_OBJECT
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key:
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0x%x \n", __func__, current_object_key);
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(gdb) backtrace
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#0 mono_thread_current () at threads.c:1275
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#1 0x68faf7ec in mono_thread_pop_appdomain_ref () at threads.c:2981
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#2 0x68faf9ab in thread_cleanup (thread=0xb84d00) at threads.c:528
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#3 0x68fb17cd in start_wrapper (data=0xbcd200) at threads.c:639
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#4 0x6901a02a in thread_start (arg=0x1144ff8) at win32_threads.c:531
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#5 0x7c80b713 in KERNEL32!GetModuleFileNameA ()
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from C:\WINDOWS\system32\kernel32.dll
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#6 0x00000000 in ?? ()
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(gdb) cont
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Continuing.
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mono_thread_cleanup: TlsFree current_object_key 0x18
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mono_thread_current: mono_thread_current calling GET_CURRENT_OBJECT key: 0x18
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Error: dll starting at 0xe00000 not found.
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Breakpoint 2, mono_thread_current () at threads.c:1275
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1275 { printf ("%s: mono_thread_current calling GET_CURRENT_OBJECT
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key:
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0x%x \n", __func__, current_object_key);
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(gdb) backtrace
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#0 mono_thread_current () at threads.c:1275
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#1 0x68ec3ead in mini_thread_cleanup (thread=0xb84d00) at mini.c:2241
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#2 0x68faf997 in thread_cleanup (thread=0xbcd290) at threads.c:541
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#3 0x68fb17cd in start_wrapper (data=0xbcd200) at threads.c:639
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#4 0x6901a02a in thread_start (arg=0x1144ff8) at win32_threads.c:531
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#5 0x7c80b713 in KERNEL32!GetModuleFileNameA ()
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from C:\WINDOWS\system32\kernel32.dll
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#6 0x00000000 in ?? ()
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(gdb) cont
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Continuing.
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mono_thread_current: mono_thread_current calling GET_CURRENT_OBJECT key: 0x18
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Breakpoint 2, mono_thread_current () at threads.c:1275
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1275 { printf ("%s: mono_thread_current calling GET_CURRENT_OBJECT
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key:
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0x%x \n", __func__, current_object_key);
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(gdb) backtrace
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#0 mono_thread_current () at threads.c:1275
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#1 0x68fb16bb in mono_thread_cleanup_apartment_state () at threads.c:3730
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#2 0x68fb17d2 in start_wrapper (data=0xbcd200) at threads.c:646
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#3 0x6901a02a in thread_start (arg=0x1144ff8) at win32_threads.c:531
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#4 0x7c80b713 in KERNEL32!GetModuleFileNameA ()
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from C:\WINDOWS\system32\kernel32.dll
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#5 0x00000000 in ?? ()
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(gdb) cont
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Continuing.
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mono_thread_current: mono_thread_current calling GET_CURRENT_OBJECT key: 0x18
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Program received signal SIGTRAP, Trace/breakpoint trap.
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[Switching to thread 3360.0x2058]
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0x7c90e4df in ntdll!LdrAlternateResourcesEnabled ()
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from C:\WINDOWS\system32\ntdll.dll
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(gdb) ba
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#0 0x7c90e4df in ntdll!LdrAlternateResourcesEnabled ()
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from C:\WINDOWS\system32\ntdll.dll
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#1 0x7c90e4f4 in ntdll!LdrAccessOutOfProcessResource ()
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from C:\WINDOWS\system32\ntdll.dll
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#2 0x7c90cfdc in ntdll!ZwClose () from C:\WINDOWS\system32\ntdll.dll
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#3 0x7c809c1b in KERNEL32!CloseHandle ()
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from C:\WINDOWS\system32\kernel32.dll
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#4 0x690198fd in GC_delete_gc_thread (thr=0x690bc7fc) at win32_threads.c:180
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#5 0x6901a124 in GC_DllMain (inst=0x68ec0000, reason=0, reserved=0x1)
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at win32_threads.c:810
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#6 0x68f1f070 in DllMain (module_handle=0x68ec0000, reason=0, reserved=0x1)
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at driver.c:1181
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#7 0x68ec1086 in <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">DllMainCRTStartup at 12</A> ()
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from D:\cygwin\usr\local\bin\mono.dll
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#8 0x7c90118a in ntdll!LdrSetAppCompatDllRedirectionCallback ()
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from C:\WINDOWS\system32\ntdll.dll
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#9 0x68ec0000 in ?? ()
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#10 0x00000000 in ?? ()
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(gdb) cont
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Continuing.
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Program exited with code 02.
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(gdb)
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]]
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--
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You are the QA contact for the bug.
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You are the assignee for the bug.
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</PRE>
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